验证php中的任何电话号码[重复]

Please I need help to validate phone numbers in various formats

Valid formats:

+111 1 11111111
+11 1111111
1111111
(+111) (11) 1111111

Etc, the format is:

• You can take a "+" sign only at the beginning and once. Can lead an
• open and closed parenthesis only the beginning. You can not have more
• than 15 numbers in total. Can not be less than 8 numbers in total.

Have This:

if(strlen($buff) < 8)
    return false;

$buff = trim(preg_replace('/\s+/', ' ', $buff));

if(preg_match('/^\(\d\) \d \d$/', $buff))
    return $buff;

return false;

Thanks.

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Smartphone tactics:

1. remove all non-numeric characters but not the +
2. replace first sign by 00 if it is a +
3. replace leading 000 by 00
4. match possible country code
5. check length between x and y

You don't even need regex for that.